Ambiguous BEM methodology documentation

“What exactly constitutes "external geometry" in BEM methodology? I'm learning BEM methodology and encountered this principle in the documentation: "The block shouldn't influence its environment, meaning you shouldn't set the external geometry (margin) or positioning for the block." I need clarification on what CSS properties are definitively considered "external geometry" and how to handle practical layout concerns. Specific Questions 1. Definition Clarification Which CSS properties are definiti”